Biogas and biogas power methanogenic

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Woodcutter
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by Woodcutter » 10/10/06, 20:49

Christophe wrote:[...] We see that pork manure is at the bottom of the list while they are often used in biogas projects ... strange ...
Slurry has a very high humidity and the water does not give methane ...
These methanogenic powers are given in raw material.
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by toto65 » 22/11/07, 22:32

Bonjour à tous
About methanisassion. There are feedback on this site
http://www.eden-enr.org/spip/IMG/pdf/Fi ... 2_EDEN.pdf

Technical Data
800 gas production m3 / day
Cogeneration Electric Power 80 kW
Thermal power 160 kW
Electricity generation 520 000 kWh
Heat production 1 000 000 kWh


I do not understand something:
Either a biogas ICH of the order of 7,5 kwh (1 m3 of natural gas or 1L of fuel oil = approximately 10 kwh) and therefore 0,75 L of fuel oil.


Per day we get: 800 x 7,5 = 6.000
Per year: 6000 x 365 = 2.190.000 kwh each year.
My reasoning is certainly wrong but I do not see where.
How is it that there is "only" 520 kWh of electricity production? or 000%
Thank you good night
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by Targol » 23/11/07, 09:21

toto65 wrote:How is it that there is "only" 520 kWh of electricity production? or 000%
Thank you good night


Probably because it adds cogeneration: most of the energy released is used to produce hot water:
Heat production 1 000 000 kWh
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by emlaurent » 24/11/07, 00:04

toto65 wrote:Per day we get: 800 x 7,5 = 6.000
Per year: 6000 x 365 = 2.190.000 kwh each year.
My reasoning is certainly wrong but I do not see where.
How is it that there is "only" 520 kWh of electricity production? or 000%


Your reasoning is just toto65!

Annual gas production contains a potential of 2.190.000kWh
This gas feeds a diesel engine whose mechanical efficiency is 24% or an electrical production of 520.000kWh
Classically engines have a yield between 20 and 30%

The rest goes into heat in the exhaust and in the cooling circuit. 1.000.000kWh is recovered and used for heating. This represents approximately 50% of the energy contained in the gas.

The rest (~ 25%) must be lost in the exhaust or perhaps when the cogé works but there is no need for heat (in the hot season for example).
Finally, the methanation tank needs to be heated permanently, which consumes 10 20% (of memory) of the heat produced.

I hope it helps you?
Emmanuel
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by toto65 » 24/11/07, 14:43

Thank you emlaurant thank you targol.
I am very surprised by this result! By imagining a return to 36% we would get 268400 kw extra.
I do not feel that it is impossible. For example a stirling engine gives a yield of 40% minus the losses of the generator. We could exceed 30%.
What do you think?
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by toto65 » 28/01/08, 22:25

Good evening everyone, did you hear about the Clérac storage center?
Image

They chose to value all the energy in thermal form.

It's interesting. From the producer directly to the consumer.
Economy: 2000 tons oil equivalent / year
Since the time that this subject is evoked. We talk about the different topics concerning the valorization of biogas.
I am rather satisfied that the industrialists are carrying such a project.
More is needed
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by Christophe » 28/01/08, 23:34

Nice explanation but um I dream or the paragraph on performance compare the efficiency of an oven (burner therefore) with that of a diesel engine ... a little easy to deceive the neophyte no?

It's written by a trainee or what? : Shock:
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by jonule » 29/01/08, 09:22

mmm it would not look like an excuse to better bury the garbage that :?:
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by Christophe » 29/01/08, 09:24

Rallala is green, always have to slow down!

So you prefer an incinerator jonule? Waste is ALREADY flush so much value their biogas not?
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by jonule » 29/01/08, 09:45

I am not green but alternative, christophe!

you do not know the law on the dusting of garbage?

and then you have to put the waste in storage CLOSED and not bury it that pollutes the basement!

obvious no?

unless it is a "French" ivnention : Lol:
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